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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/2617/">https://reviewboard.asterisk.org/r/2617/</a>
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<p style="margin-top: 0;">On June 12th, 2013, 4:49 p.m. UTC, <b>Joshua Colp</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/2617/diff/1/?file=39559#file39559line1103" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/include/asterisk/pbx.h</a>
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(Diff revision 1)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">int ast_async_goto(struct ast_channel *chan, const char *context, const char *exten, int priority);</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * \param locked_channel Optional. The outbound channel that was created. This is returned</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * both locked and reference bumped. If a caller provides a channel parameter, it must</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * unlock the channel and decrement the reference count.</span></pre></td>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Any reason you kept the whole locking thing in play, and not just returned with ref bumped?</pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">In manager's case, you want to access properties of the channel. While that shouldn't change out from underneath you in normal circumstances, it could if the channel was immediately masqueraded.
So, it is safer to keep it locked.</pre>
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<p>- Matt</p>
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<p>On June 12th, 2013, 4:45 p.m. UTC, Matt Jordan wrote:</p>
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<div>Review request for Asterisk Developers and Joshua Colp.</div>
<div>By Matt Jordan.</div>
<p style="color: grey;"><i>Updated June 12, 2013, 4:45 p.m.</i></p>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
Asterisk
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">*NOTE*: this only happens on trunk.
The originate APIs allow callers to provide a pointer to a channel that will point to the originated channel if the function call succeeds. This is used by AMI to provide channel information when the originate is performed synchronously. Unfortunately, if the originate fails in certain ways, the outbound channel is already disposed of during the dialing itself. This results in the channel being improperly dereferenced by the internal originate function in pbx.c.
This patch ref bumps the channel to prevent this from occurring. Callers must now unlock and unref the channel (which is more in line with general channel management guidelines anyway).
This only affects manager, as it is the only consumer of this API function that actually passes in a channel pointer.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">One of the Dial tests in the Asterisk Test Suite caught this. With this change, it stopped crashing and reported the failure of the originate correctly.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/trunk/main/pbx.c <span style="color: grey">(391524)</span></li>
<li>/trunk/main/manager.c <span style="color: grey">(391524)</span></li>
<li>/trunk/include/asterisk/pbx.h <span style="color: grey">(391524)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/2617/diff/" style="margin-left: 3em;">View Diff</a></p>
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